History of Draenor

With the help of the Naaru, Prophet Valen escapes on the Genedar with other Eradar that reject Sargeras' offer. The Naaru name them the Draenei, or "Exiled Ones."

On Draenor, Gnarlgar rallies the Primals against the Apexis and creates a new Sporemound known as Taala. The Apexis annihilate the Primal army with the Breath of Rukhmar, permanently destroying the Evergrowth and preventing it from ever returning again, leading to a golden age of mortal civilization on Draenor.

Imperator Molok of the Gorian Empire sends an ogre army to claim the Throne of the Elements and the power of the elements by force. The dissonance between the ogres' reckless arcane magic and the lingering power of Grond's remains creates an explosion that blows apart the orcish temple, leaving behind only a few standing stones and throwing the elements into disarray across Draenor.

The orcs lay siege to the ogre capital Goria. Molok and his sorcerers create the red pox, which begins to spread among the orcs, but Nelgarm and his fellow shaman convince the elements to completely destroy Goria.

Talgath discovers the draenei civilization on Draenor. Kil'jaeden commands him to observe the inhabitants of the world for the time being.

Medivh continues to study demonic lore and Azerothian history and becomes convinced that the world is inherently flawed, too divided by petty rivalries to ever unite into a single force in case of a demonic invasion. He concludes that he needs an army to change things and begins venturing out into the cosmos, eventually discovering Draenor and the orcs.

Gul'dan returns to his home village and burns it and everyone within it to ash to prevent anyone from learning about his past. He then ventures to the Shadowmoon clan and convinces them to let him join them, claiming that his home village was destroyed by ogres. Gul'dan wins the friendship of the Shadowmoon chieftain, the shaman Ner'zhul, allowing Kil'jaeden to begin manipulating Ner'zhul's thoughts.

Ner'zhul's apprehension about the war with the draenei grows. Kil'jaeden appears to him in the form of Rulkan and tells him of powerful beings who could aid the orcs, and the night after Kil'jaeden appears again as a radiant elemental entity and urges him to push the Horde to victory and exterminate the draenei. Ner'zhul secretly embarks on a journey to Oshu'gun to seek the guidance of the ancestors, but Kil'jaeden is aware of his plans and tells Gul'dan to gather allies to control the Shadowmoon, since Ner'zhul can no longer be relied upon. Gul'dan recruits Teron'gor and several other shaman and begin teaching them fel magic.

Gul'dan forms the Shadow Council to watch over the orcs and includes Blackhand in the organization, but Gul'dan's trusted Shadowmoon warlocks secretly form the inner circle of the organization. The warlock recruits new members for the council, including Cho'gall and Garona, and creates a group called the necrolytes.

Blackhand orders the construction of the Hellfire Citadel and organizes the various clans into specific roles within the Horde. He also forms a new clan known as the Black Tooth Grin and names Eitrigg, Orgrim Doomhammer and Varok Saurfang as his lieutenants in the Blackrock clan.

Cho'gall recruits the pale orcs into the Horde and forms the Twilight's Hammer clan.

The orcs gather for an assault on Karabor. Cyrukh appears in a nearby volcano to confront them, but Gul'dan and his warlocks gather on the volcano's slopes to shatter the being's physical form and infuse its power into the orcs, shattering the last connection between the orcs and the elements. The volcano becomes known as the Hand of Gul'dan.   The draenei hold the orcish assault at bay for a time but are defeated when the Horde uses the power of the Dark Star to kill or drive insane many of the defenders and permanently darken Karabor, turning it into the Black Temple. Velen and the survivors manage to flee via the harbor

The victims of the red pox quarantined in Garadar remain isolated from the fel corruption, leading them to become known as the Mag'har, "Uncorrupted".

Many of the survivors retreat to Auchindoun. Teron'gor and other Shadow Council agents are dispatched to the mausoleum, but when they are repelled by the draenei and Auchindoun's spirits they attempt to summon a powerful demon to aid them. Instead, they accidentally summon Murmur, whose arrival blasts Auchindoun apart and levels the surrounding forests. The warlocks bind Murmur within Auchindoun to prevent it from wreaking havoc on the Horde.

Blackhand turns his attention on Draenor's other inhabitants. Kilrogg Deadeye and the Bleeding Hollow clan launch a campaign against Farahlon, while Grommash Hellscream and Cho'gall topple Highmaul. Elsewhere, the Frostwolf, Whiteclaw and Thunderlord clans are charged with hunting down the ogres, ogron, gronn and magnaron, though only the Thunderlords obey.

Kil'jaeden ceases to communicate with Gul'dan on Sargeras' orders. The orcs begin to flounder on Draenor as the world slowly dies. The threat of starvation causes the orcs to hunt many of Draenor's native creatures to extinction and begin fighting amongst themselves.